OpenJPEG  2.3.1
mqc.h
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1 /*
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7  * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
8  * Copyright (c) 2002-2014, Professor Benoit Macq
9  * Copyright (c) 2001-2003, David Janssens
10  * Copyright (c) 2002-2003, Yannick Verschueren
11  * Copyright (c) 2003-2007, Francois-Olivier Devaux
12  * Copyright (c) 2003-2014, Antonin Descampe
13  * Copyright (c) 2005, Herve Drolon, FreeImage Team
14  * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
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38 
39 #ifndef OPJ_MQC_H
40 #define OPJ_MQC_H
41 
42 #include "opj_common.h"
43 
54 
58 typedef struct opj_mqc_state {
64  const struct opj_mqc_state *nmps;
66  const struct opj_mqc_state *nlps;
68 
69 #define MQC_NUMCTXS 19
70 
74 typedef struct opj_mqc {
81  /* only used by decoder, to count the number of times a terminating 0xFF >0x8F marker is read */
93  /* lut_ctxno_zc shifted by (1 << 9) * bandno */
98 
99 #include "mqc_inl.h"
100 
103 /* ----------------------------------------------------------------------- */
104 
116 void opj_mqc_resetstates(opj_mqc_t *mqc);
124 void opj_mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb,
125  OPJ_INT32 prob);
131 void opj_mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp);
137 #define opj_mqc_setcurctx(mqc, ctxno) (mqc)->curctx = &(mqc)->ctxs[(OPJ_UINT32)(ctxno)]
138 
143 void opj_mqc_encode(opj_mqc_t *mqc, OPJ_UINT32 d);
148 void opj_mqc_flush(opj_mqc_t *mqc);
155 
162 
175 void opj_mqc_bypass_flush_enc(opj_mqc_t *mqc, OPJ_BOOL erterm);
180 void opj_mqc_reset_enc(opj_mqc_t *mqc);
181 
182 #ifdef notdef
183 
188 OPJ_UINT32 opj_mqc_restart_enc(opj_mqc_t *mqc);
189 #endif
190 
200 void opj_mqc_erterm_enc(opj_mqc_t *mqc);
205 void opj_mqc_segmark_enc(opj_mqc_t *mqc);
206 
225 void opj_mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len,
226  OPJ_UINT32 extra_writable_bytes);
227 
247  OPJ_UINT32 extra_writable_bytes);
248 
249 
258 void opq_mqc_finish_dec(opj_mqc_t *mqc);
259 
265 /*static INLINE OPJ_UINT32 opj_mqc_decode(opj_mqc_t * const mqc);*/
266 /* ----------------------------------------------------------------------- */
270 
271 #endif /* OPJ_MQC_H */
opj_mqc_state_t
struct opj_mqc_state opj_mqc_state_t
This struct defines the state of a context.
OPJ_BYTE
unsigned char OPJ_BYTE
Definition: openjpeg.h:117
opj_mqc_raw_init_dec
void opj_mqc_raw_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len, OPJ_UINT32 extra_writable_bytes)
Initialize the decoder for RAW decoding.
Definition: mqc.c:531
mqc_inl.h
opj_mqc_init_enc
void opj_mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp)
Initialize the encoder.
Definition: mqc.c:283
opj_mqc_reset_enc
void opj_mqc_reset_enc(opj_mqc_t *mqc)
RESET mode switch.
Definition: mqc.c:415
opj_mqc
MQ coder.
Definition: mqc.h:74
opj_mqc::bp
OPJ_BYTE * bp
pointer to the current position in the buffer
Definition: mqc.h:84
opj_mqc_erterm_enc
void opj_mqc_erterm_enc(opj_mqc_t *mqc)
ERTERM mode switch (PTERM)
Definition: mqc.c:462
opj_mqc::curctx
const opj_mqc_state_t ** curctx
Active context.
Definition: mqc.h:92
OPJ_COMMON_CBLK_DATA_EXTRA
#define OPJ_COMMON_CBLK_DATA_EXTRA
Margin for a fake FFFF marker.
Definition: opj_common.h:39
T1_CTXNO_UNI
#define T1_CTXNO_UNI
Definition: t1.h:65
opj_mqc_bypass_init_enc
void opj_mqc_bypass_init_enc(opj_mqc_t *mqc)
BYPASS mode switch, initialization operation.
Definition: mqc.c:334
opj_mqc_codemps
static void opj_mqc_codemps(opj_mqc_t *mqc)
Encode the most probable symbol.
Definition: mqc.c:231
opj_mqc_segmark_enc
void opj_mqc_segmark_enc(opj_mqc_t *mqc)
SEGMARK mode switch (SEGSYM)
Definition: mqc.c:478
opj_mqc_erterm_enc
void opj_mqc_erterm_enc(opj_mqc_t *mqc)
ERTERM mode switch (PTERM)
Definition: mqc.c:462
opj_mqc_resetstates
void opj_mqc_resetstates(opj_mqc_t *mqc)
Reset the states of all the context of the coder/decoder (each context is set to a state where 0 and ...
Definition: mqc.c:546
T1_CTXNO_AGG
#define T1_CTXNO_AGG
Definition: t1.h:64
opj_common.h
T1_CTXNO_ZC
#define T1_CTXNO_ZC
Definition: t1.h:61
opj_mqc_bypass_get_extra_bytes
OPJ_UINT32 opj_mqc_bypass_get_extra_bytes(opj_mqc_t *mqc, OPJ_BOOL erterm)
Return number of extra bytes to add to opj_mqc_numbytes() for the² size of a non-terminating BYPASS p...
Definition: mqc.c:371
opj_mqc_bypass_enc
void opj_mqc_bypass_enc(opj_mqc_t *mqc, OPJ_UINT32 d)
BYPASS mode switch, coding operation.
Definition: mqc.c:352
opj_mqc_state::nmps
const struct opj_mqc_state * nmps
next state if the next encoded symbol is the MPS
Definition: mqc.h:64
opj_mqc_state::mps
OPJ_UINT32 mps
the Most Probable Symbol (0 or 1)
Definition: mqc.h:62
opj_mqc_restart_init_enc
void opj_mqc_restart_init_enc(opj_mqc_t *mqc)
RESTART mode switch (TERMALL) reinitialisation.
Definition: mqc.c:442
opq_mqc_finish_dec
void opq_mqc_finish_dec(opj_mqc_t *mqc)
Terminate RAW/MQC decoding.
Definition: mqc.c:540
opj_mqc_flush
void opj_mqc_flush(opj_mqc_t *mqc)
Flush the encoder, so that all remaining data is written.
Definition: mqc.c:315
opj_mqc_numbytes
OPJ_UINT32 opj_mqc_numbytes(opj_mqc_t *mqc)
Return the number of bytes written/read since initialisation.
Definition: mqc.c:274
opj_mqc::a
OPJ_UINT32 a
only used by MQ decoder
Definition: mqc.h:78
opj_mqc_init_dec
void opj_mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len, OPJ_UINT32 extra_writable_bytes)
Initialize the decoder for MQ decoding.
Definition: mqc.c:507
opj_mqc_bypass_enc
void opj_mqc_bypass_enc(opj_mqc_t *mqc, OPJ_UINT32 d)
BYPASS mode switch, coding operation.
Definition: mqc.c:352
opj_mqc_setstate
void opj_mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb, OPJ_INT32 prob)
Set the state of a particular context.
Definition: mqc.c:554
OPJ_BOOL
int OPJ_BOOL
Definition: openjpeg.h:110
opj_mqc_codelps
static void opj_mqc_codelps(opj_mqc_t *mqc)
Encode the most least symbol.
Definition: mqc.c:247
opj_mqc::ctxs
const opj_mqc_state_t * ctxs[MQC_NUMCTXS]
Array of contexts.
Definition: mqc.h:90
mqc_states
static const opj_mqc_state_t mqc_states[47 *2]
Definition: mqc.c:82
opj_includes.h
BYPASS_CT_INIT
#define BYPASS_CT_INIT
Definition: mqc.c:332
opj_mqc_numbytes
OPJ_UINT32 opj_mqc_numbytes(opj_mqc_t *mqc)
Return the number of bytes written/read since initialisation.
Definition: mqc.c:274
opj_mqc_raw_init_dec
void opj_mqc_raw_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len, OPJ_UINT32 extra_writable_bytes)
Initialize the decoder for RAW decoding.
Definition: mqc.c:531
opj_mqc_init_enc
void opj_mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp)
Initialize the encoder.
Definition: mqc.c:283
opj_mqc_init_dec
void opj_mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len, OPJ_UINT32 extra_writable_bytes)
Initialize the decoder for MQ decoding.
Definition: mqc.c:507
opj_mqc::end
OPJ_BYTE * end
pointer to the end of the buffer
Definition: mqc.h:88
opj_mqc_bypass_init_enc
void opj_mqc_bypass_init_enc(opj_mqc_t *mqc)
BYPASS mode switch, initialization operation.
Definition: mqc.c:334
OPJ_INT32
int32_t OPJ_INT32
Definition: openjpeg.h:125
opj_mqc_setcurctx
#define opj_mqc_setcurctx(mqc, ctxno)
Set the current context used for coding/decoding.
Definition: mqc.h:137
opj_mqc_flush
void opj_mqc_flush(opj_mqc_t *mqc)
Flush the encoder, so that all remaining data is written.
Definition: mqc.c:315
opj_mqc_state::nlps
const struct opj_mqc_state * nlps
next state if the next encoded symbol is the LPS
Definition: mqc.h:66
opj_mqc_byteout
static void opj_mqc_byteout(opj_mqc_t *mqc)
Output a byte, doing bit-stuffing if necessary.
Definition: mqc.c:185
opj_mqc::start
OPJ_BYTE * start
pointer to the start of the buffer
Definition: mqc.h:86
opj_mqc_bypass_flush_enc
void opj_mqc_bypass_flush_enc(opj_mqc_t *mqc, OPJ_BOOL erterm)
BYPASS mode switch, flush operation.
Definition: mqc.c:377
opj_mqc_setstate
void opj_mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb, OPJ_INT32 prob)
Set the state of a particular context.
Definition: mqc.c:554
opq_mqc_finish_dec
void opq_mqc_finish_dec(opj_mqc_t *mqc)
Terminate RAW/MQC decoding.
Definition: mqc.c:540
opj_mqc_state::qeval
OPJ_UINT32 qeval
the probability of the Least Probable Symbol (0.75->0x8000, 1.5->0xffff)
Definition: mqc.h:60
opj_mqc_segmark_enc
void opj_mqc_segmark_enc(opj_mqc_t *mqc)
SEGMARK mode switch (SEGSYM)
Definition: mqc.c:478
opj_mqc_resetstates
void opj_mqc_resetstates(opj_mqc_t *mqc)
Reset the states of all the context of the coder/decoder (each context is set to a state where 0 and ...
Definition: mqc.c:546
opj_mqc_bypass_flush_enc
void opj_mqc_bypass_flush_enc(opj_mqc_t *mqc, OPJ_BOOL erterm)
BYPASS mode switch, flush operation.
Definition: mqc.c:377
opj_mqc_init_dec_common
static void opj_mqc_init_dec_common(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len, OPJ_UINT32 extra_writable_bytes)
Definition: mqc.c:488
opj_mqc_bypass_get_extra_bytes
OPJ_UINT32 opj_mqc_bypass_get_extra_bytes(opj_mqc_t *mqc, OPJ_BOOL erterm)
Return number of extra bytes to add to opj_mqc_numbytes() for the² size of a non-terminating BYPASS p...
Definition: mqc.c:371
opj_mqc::c
OPJ_UINT32 c
temporary buffer where bits are coded or decoded
Definition: mqc.h:76
OPJ_UINT32
uint32_t OPJ_UINT32
Definition: openjpeg.h:126
opj_mqc_reset_enc
void opj_mqc_reset_enc(opj_mqc_t *mqc)
RESET mode switch.
Definition: mqc.c:415
opj_mqc_state
This struct defines the state of a context.
Definition: mqc.h:58
opj_mqc_restart_init_enc
void opj_mqc_restart_init_enc(opj_mqc_t *mqc)
RESTART mode switch (TERMALL) reinitialisation.
Definition: mqc.c:442
opj_mqc_encode
void opj_mqc_encode(opj_mqc_t *mqc, OPJ_UINT32 d)
Encode a symbol using the MQ-coder.
Definition: mqc.c:306
opj_mqc::backup
OPJ_BYTE backup[OPJ_COMMON_CBLK_DATA_EXTRA]
Original value of the 2 bytes at end[0] and end[1].
Definition: mqc.h:96
opj_mqc_bytein
static INLINE void opj_mqc_bytein(opj_mqc_t *const mqc)
Input a byte.
Definition: mqc_inl.h:175
opj_mqc_setbits
static void opj_mqc_setbits(opj_mqc_t *mqc)
Fill mqc->c with 1's for flushing.
Definition: mqc.c:259
opj_mqc_encode
void opj_mqc_encode(opj_mqc_t *mqc, OPJ_UINT32 d)
Encode a symbol using the MQ-coder.
Definition: mqc.c:306
opj_mqc_t
struct opj_mqc opj_mqc_t
MQ coder.
opj_mqc::ct
OPJ_UINT32 ct
number of bits already read or free to write
Definition: mqc.h:80
opj_mqc_renorme
static void opj_mqc_renorme(opj_mqc_t *mqc)
Renormalize mqc->a and mqc->c while encoding, so that mqc->a stays between 0x8000 and 0x10000.
Definition: mqc.c:219
MQC_NUMCTXS
#define MQC_NUMCTXS
Definition: mqc.h:69
opj_mqc::end_of_byte_stream_counter
OPJ_UINT32 end_of_byte_stream_counter
Definition: mqc.h:82
opj_mqc::lut_ctxno_zc_orient
const OPJ_BYTE * lut_ctxno_zc_orient
Definition: mqc.h:94